A is introduced to B and asks him about his age. B: I am the oldest of 3 brothers, 144 is the product of our ages, all integer numbers. A: I still don't know your age.
B: The sum of all our ages is the number of the bus that brought you here. A: I know the number, but not your age. B: Only the youngest is red-headed. A: Now I know all your ages.